>> through the city of antwerp, which is the main diamond cartier in belgium, we have eight in every ten uncut diamond and five in every ten uncut diamonds. it's worth billions. >> sreenivasan: thanks so much. >> thanks for having me. >> sreenivasan: the civilian death toll in afghanistan has dropped for the first time in six years. a new report today from the united nations said more than 2,700 civilians died last year. that was down from more than 3,100 the previous year. still, violence claimed the lives of more women and girls, up 20% from 2011. the new data came a day after president hamid karzai banned afghan troops from calling in air strikes in residential areas. the former top u.s. commander in afghanistan is going to retire, instead of becoming the overall nato commander in europe. president obama announced today that marine general john allen will end his military career. allen's nomination for the nato post was put on hold last fall, amid questions about e-mail exchanges with a woman in florida. the general was cleared of all wrongdoing, but he said today he needs to focu